Iomega 500 GB External HDD no longer recognized.

By EdwardoTheGreat3 ·
I've had it for a few months and it's worked fine. Then the other day I shut it off and next time i turned it on it wouldn't show up in My Computer, Device Manager, anything. What can i do?

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Lots of possibilities

by tmalo627 In reply to Iomega 500 GB External HD ...

If there is a jump drive plugged in, you may just have a drive letter assignment issue. Really easy to deal with: go to your disk management console (Start > Run > diskmgmt.msc). If this is the problem you will see your different disks and one with no letter. Right click and select "Change drive letter and paths.."

If that's not it, stay in the disk management console and click Actions, then select rescan disks. See if it appears.

If that doesn't do it, try plugging it into another USB or Firewire port (whatever the correct interface is.)

If that doesn't do it go to Start > Run > services.msc and make sure Plug N Play is enabled and started. If it is, try restarting.

If that doesn't do it, test the drive on another computer to see if it works there.

Hope this helps.

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If none of the above works

by OH Smeg In reply to Iomega 500 GB External HD ...

You also need to look at the actual HDD and Enclosure here, so start off with the easy things check the Data Lead tot he Computer from the Enclosure for any Damage and also the Power Pack for correct function if there is one involved here.

Typically these drives are for Part Time use only so if they are left on most of the time they overheat and damage the electronics on the HDD or in the Enclosure. When this happens you need to remove the HDD from the enclosure and test it with the Makers Testing Utility and here that means the HDD Makers Testing Utility not Iomega as they do not actually make the HDD. You can use the link here for the Makers Testing Utility

Naturally you need to replace anything that has been damaged so if you are not seeing any mention of a Mass Storage Device the Enclosure isn't being seen by the computer so check the Data Lead for damage and replace if necessary. However if that isn't the issue and you are still not seeing the Mass Storage Device listed in Drive Management or when you plug the enclosure in you need to look at either it's Power Supply or the available power from the USB Port if there is no Power Supply. Typically any HDD in an Enclosure over 80 GIG Capacity should have either a separate Power Supply or a Y Lead that has 2 USB A Plugs. that need to be plugged into different USB ports to supply sufficient power to run the HDD. Typically USB Ports are suppose to supply 500 Milliamperes but with modern NB's to improve Battery Life this is reduced below that level. Also the Y USB Cable has 2 plugs that are supposed to be plugged into the computer and the one that is the longest away from the enclosure is only a Power lead not a Data & power Lead so if that is all that is plugged in there is no possibility of the Computer seeing the HDD as the required internal cables are not inside that part of the USB Cable.

If you do not have a separate Power Supply with the enclosure and can not plug into 2 separate USB Ports you should use a Powered USB Hub and plug into 2 of it's ports but only after you have made sure that the Mains Plug Pack is working correctly and that the USB Hub is connected tot he computer.

If however a Mass Storage Device is listed under Drive Management but the HDD isn't then the most likely thing to have happened is that the drive has never been shut down correctly using the Safely Remove Option on the Task Bar and has just been unplugged or left connected while the computer is turned off. When this is done the Drive eventually gets corrupted by being incorrectly shut down so the Partition Information becomes unreadable and the drive is invisible. If that is the case here all that is required is to Format the Drive again to get it working but that would loose any Stored Data on the Drive so if that is important here you need to rebuild the Partition Information with one of the Data Recovery Applications or if that is not piratical you need to recover the data off this drive.

There are a whole lot of different programs available
Here is a short list of the better ones

While the last 2 are from the same company they are very different products. Win Hex should only be considered foe use by someone who knows Hex Inside Out while Davory is a great cheap General Purpose Application.

Personally I prefer the On Track Option but it's anything but cheap. However because I use this type of software a lot it's paid for itself many times over by now, for a cheaper option Spin Rite from Gibson Research or Stella have both very good reputations by other TR members.

However if you need to use any External Drive for long periods of time you should use an Actively Cooled Enclosure like the MX1 from Antec as this allows the HDD to stay relatively cool and not build up the heat to do the damage that it will do tot he electronics involved.


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